theorem Th32:
  for q,r,t,K,f st [q '&' r,t,K,f] in SepQuadruples p holds [q,t,K
  ,f] in SepQuadruples p & [r,t+QuantNbr(q),K,f] in SepQuadruples p
proof
  SepQuadruples(p) is_Sep-closed_on p by Def13;
  hence thesis;
end;
